Material: Galvanized steel Total Length of Trampoline Anchor: 15.74 inches Strap Length (unbuckled): 96 inches Length of Spiral Anchor: 9.25 inches Durable Material: The galvanized steel trampoline stakes are corrosion resistant, and last for long time. Strap buckle made of metal(not cheap plastics). The straps have a high tensile strength for resisting the wind, up to 660lbs. Easy to use: With sharp anchor, make it easy to twist deep into the ground. The straps, stake, and trampoline create a triangular support, which improve the stability of the trampoline and wind-resistance. Package Included: 4 x trampoline anchor kit, 4 x straps